Cost of Contracts, net - Future Amoritization and Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Expected future amortization of cost of contracts
2018	$ 2.8
2019	2.2
2020	1.1
2021	0.6
2022	0.5
2023 and Thereafter	1.7
Cost of contracts, net	$ 8.9	$ 11.4

No definition available.

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- Definition

Represents the amount of amortization expense expected to be recognized after the fifth fiscal year following the latest fiscal year for other deferred costs.

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No definition available.

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- Definition

Represents the amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for other deferred costs.

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No definition available.

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- Definition

Represents the amount of amortization expense expected to be recognized during the fifth fiscal year following the latest fiscal year for other deferred costs.

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No definition available.

+ Details

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- Definition

Represents the amount of amortization expense expected to be recognized during the fourth fiscal year following the latest fiscal year for other deferred costs.

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No definition available.

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- Definition

Represents the amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for other deferred costs.

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No definition available.

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- Definition

Represents the amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for other deferred costs.

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No definition available.

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- Definition

Net amount of other deferred costs capitalized at the end of the reporting period. Does not include deferred finance costs or deferred acquisition costs of insurance companies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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